A ball is launched horizontally from a cliff with an initial velocity of u ms. After two seconds, the ball's velocity is in the direction 45° from the horizontal. What is the magnitude of the velocity in m s-1 at two seconds? (A) u (B) 1.5 u (C) 19.6 (D) 27.7
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- A jetliner is moving at a speed of 245 m/s. The vertical component of the plane's velocity is 40.6 m/s. Given sin e = 0.165, the angle theta is equal to: Select one: O e = 10.0° e = 9.5° e = 11.5° e = 11.0° O OA secret agent skis off a slope inclined at θ = 31.5 degrees below horizontal at a speed of v0 = 14.7 m/s. He must clear a gorge, and the slope on the other side of the gorge is h = 18.4 m below the edge of the upper slope. What is the maximum width, w, of the gorge (in meters) so that the agent clears it?Determine the vector magnitudes and directions for the relative velocities VA/B and VB/A, given these magnitudes and directions for the vectors VA and VB:(a) VA: magnitude 70km/h ; direction 30°VB: magnitude 50km/h ; direction 125° (b)VA: magnitude 70km/h ; direction 30°VB: magnitude 50km/h ; direction 225° (c) VA: magnitude 70km/h ; direction 30°VB: magnitude 50km/h ; direction 340° (d)VA: magnitude 70km/h ; direction 135°VB: magnitude 50km/h ; direction 60°NOTE: The direction is the angle (degrees) from the positive horizontal axes in an anticlockwise direction.
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